Furnace-door.



G. W. SHEAR..

FURNAGE DOOR. APPLIGATION FILED JAN.15. 1903.

PATENTED AUG. 28, 1906.

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G. W. SHBAR, y PURNAGE DOOR.

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U N ITED4 STATES PATENT OFFIOE.

FURNACE-DOOR.

Specification of Letters Patent.

Patented Aug. 28, 1906.

Application liled January 15,1903. Serial No. 189,231.

To all whom it may concern.'

Be it known that I,.G1ioner. W. SHEAR, a citizen of the United States,residing at Joliet, in the county of Will and State of Illinois, haveinvented certain new and useful Improvements in Furnace-Doors, of whichthe following is a specification.

This invention relates to improvements in the construction andarrangement of metallurgical furnaces of that type in which bars orplates of metal are heated for tempering, annealing, or other treatment.

The chief objects sought by these improvements are to provide a door orclosure that may be easily opened and closed, that'will permit theminimum escape of heat when the products are being placed in the furnaceor withdrawn from same, that will hug closely the front of the furnaceat all times, thus conserving the heat under all conditions, that will not be liable to Warp from the heat to which it is subjected, and thatpermits adjustability in the size of the opening to the doorway. Incarrying out these and other objects of general novelty and utility Ihave designed the furnace illustrated in the accompanying drawings,which from a part of this application, and in which Figure 1 is a frontelevation of a furnace equipped with my improvements. Fig. 2 is anenlarged cross-section on the line of Fig. 1. Fig. 3 is an enlargedcross-section on the line y y of Fig. l. Fig. 4 is a detail, partly insection, showing the manner of adjusting the size of the opening in thedoor. Figs. 5 and 6 are details of one of the wearing-plates used on theends of the door-sections.

Referring to the drawings in detail, A represents the front of a furnaceor so much of the front as is necessary to show to properly illustratemy invention. Through the front is the usual oblong doorway a, throughwhich the products are placed in or withdrawn from the furnace. Aroundthe doorway is a frame B, which is secured to the front of the furnaceby bolts b and is formed With a hollow chamloer b2, which extends acrossthe top of the frame and part way down both ends. The bottom portion b3of the frame is made separate from the upper part, has a separatewater-chamber b4, and constitutes the fore-plate or sill of the doorway.Water-pipes b5 connect the Water-chambers b2 b4, and inlet and outletpipes b and 67, respectively, serve to conduct water to and lead it fromsaid chambers, whereby a continuous circulation of water maybemaintained through said chambers. The portion of the fore-plateimmediately in front of the doorway is reinforced by an angle-plate bsto protect it from the wear of the tongs or other tools used by theoperator, while the portions on each side of said doorway are formedwith a double bevel, as shown in Fig. 3, which fit intocorrespondingly-grooved portions of the ends of the frame, thuscentering or dovetailing the two sections of the frame together toresist any tendency to warp or pull away from the front of the furnacewhich either section might have.

Extending across the front of the furnace and above the frame is a trackO, which is supported from the furnace by brackets c, bolted to thefront of the latter. From this track are supported by hangers c2 andpulleys c3 the doors D D, to be described, which are bolted to theadjustable beams c4 c, the latter being secured to the lower ends of thehangers c2. The beams c4 c5 are formed from channel-iron, have theiradjacent ends spaced apart and connected by a sleeve c, also formed ofchannel-iron. One end of this sleeve is bolted rigidly to the beam c4and is provided with a series of threaded openings c", into any one ofwhich may be screwed a stud-bolt c7, the shank of which extends througha slot c8 in the beam The beam ci is adapted to slide on the sleeve tothe eX- tent permitted by said slot, and it will be apparent that bychanging the position of the bolt on the sleeve the distance between theadjacent ends of the beams c4 c5 may be controlled, it being understoodthat the shank of the bolt will strike against the outer end of the slotwhen the beam c5 is pushed away from the beam c4 and against the otherend of the slot 4when the beams are pushed toward each other.

Each of the doors D D is preferably made in two sections, one of whichis formed with a flange d2, which overhangs the adjacent end of theother complementary section, thus forming a tight joint therebetween.The outer ends of the door-sections are formed with a wedge-shaped lug(Z3 on their upper and lower sides, which slide into and fit tightlycorrespondingly-shaped grooves d4 in the wearing-plates d5, which coverthe ends of the doors and protect same from wear and in- IOO IIO

jury resulting from the tongs or other tools ofA the operators. Ifdesired, these plates may be positively secured to the ends ofthe doorsbut under ordinary conditions the method of securing same which I haveshown will prevent displacement and at the same time will permit thequick removal of a worn-out or broken wearing-plate and the substitutionof a new one.

Each of the door-sections is formed with lugs or ears d on its top,which are bolted to the beams c4 c, and has extending therethrough onthe side toward the furnace a channel d, into which are laid fire-brick(i7. The upper and lower walls of the channel are slightly thickertoward the opening, thus contracting the mouth of the channel, and thereby preventing the brick from falling out, it being-understood that thebrick are cut to fit said channel and pushed into it before thewearing-plates are in position. The back .walls of the door-sections arepreferably formed hollow to provide a water-chamber d8, which iscomplete in each section and has communicating therewith an inletwaterpipe e and an outlet-pipe e2. These pipes extend upwardly from thetops of the doors, and the upper end of the first inlet-pipe in thesection at the left-hand end of the door is connected with a pipe c3,leading to a suitable source of supply. The outlet-pipe for said sectionis connected by pipe e with the inletpipe c 'of the complementarysection, the outlet-pipe of which is in turn connected with theinlet-pipe c of the opposite section of the door l)l when thearrangement of pipes and connections is repeated, thus providing forcirculation of water through the chambers in said door-sections. Theconnecting-pipes are flexible and made long enough to provide for themovements and adjustability of said sections.

The doorsections included in the part D are hung from the beam c4, towhich they are rigidly secured in the manner described,while thesections composing the part D are likewise rigidly hung from the beamc5, so that the relative positions of said beams govern thecorresponding positions of the door elements D D. It follows, therefore,that the opening between the adjacent ends of the door-sections D D iscontrolled by the adjusting of the beam c'i on the sleeve c. Duringfiring and until the furnace is brought to the desired heat the doors DD/ are together and completely cover the doorway 3 but when it isdesired to operate the furnace the adj acent ends of said doors areseparated., thereby forming an opening to permit access to the doorway,which opening is moved across the doorway from left to right to permitthe insertion of the products and the withdrawal of same. Thusat no timeis the doorway uncovered for a greater distance than the width of theopening between the ends of the sections D D. Ihen the entire doorwayhas been traversed in this manner, the operator pushes both sectionsback to their initial position and the operation is repeated.

By lining the door-sections with brick and by placing thereinwater-chambers I effectively provide against the warping of the doorsand am thus able to maintain a lclose fit between the inner face of thedoors and the door-fraine.

Having thus described my invention, what I claim as new, anddesire tosecure by Letters Patent, is-

l. In a furnace-door, a channeled section having open ends and sides andadapted. to hold fire-brick in its channel, and plates removablyattached to-the ends of said section and forming closures therefor7 saidplates having wedge-shaped grooves fitting corresponding projections onthe sections.

2. In a furnace, doer-sections having their i adjacent ends interlockedand having an4 open channel extending throughout said sections adaptedto receive fire-brick, and the walls of said channel being contractedtoward the o pen side, and plates slidably mounted` on the outer ends ofthe sections.

3. In a furnace, a door having an open channel in the side next thefurnace, wedgeshaped lugs on the ends of the door, and wearing-platesadapted te fit on said lugs and to forni the ends of the door.

4. In a furnace, a door formed in sections having interlocking ends,leach of said sections formed with a channel adapted to receive a liningof fire-brick, an d wearing-plates removably secured to saiddoor-sections and forming the outer ends thereof.

5. In a furnace, a'double door each part of which is formed of sectionsfitted together and each section lined with fire-brick, and the two doormembers adapted to have their adjacent ends adjusted relatively to eachother, whereby the opening therebetween may be increased or diminished,substantially as set forth.

6. In a furnace, a horizontally-slidable door formed in two parts havinga slidable relation to each other, and each of said parts formed ininterlocking sections provided with channels in their sides next thefurnace, with fire-brick lining said channels, and each Of said sectionshaving a water-chamber therein.

7. In a furnace, a horizontally-slidable door formed in two parts havinga slidable relation to each other, and each of said parts formed insections fitted together, and wearing-plates removably secured to theouter ends of said sections.

S. In a furnace, a horizontally-slidable door formed in two parts havinga slidable relation to each other, and means from which said doors arehung said means having slidable and adjustable relations, substantiallyin the manner set forth.

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9. In a furnace, a llorizontally-slidable l In testimony whereof l'affix my signature door formed in parts having a slidable relainpresence of two Witnesses.

doors7 said means consisting of beams having GEORGE YV' SHEAR' aslidable relation to each other, and suitable Witnesses:

hangers for said beams, substantially as de- JOHN HULSIZER, si scribed.

, F. BENJAMIN.

